added godoc and travis icons

.travis.yml

@@ -0,0 +1,9 @@
+language: go
+
+go:
+  - 1.4
+  - 1.5
+
+script: 
+ - go test -cpu=2
+ - go test -cpu=2 -race

README.md

@@ -1,3 +1,6 @@
+[![godoc](https://godoc.org/github.com/pierrec/lz4?status.png)](https://godoc.org/github.com/pierrec/lz4)
+[![Build Status](https://travis-ci.org/pierrec/lz4.svg?branch=master)](https://travis-ci.org/pierrec/lz4)
+
 # lz4
 LZ4 compression and decompression in pure Go